A black hole is the last phase in a massive star's life cycle. But to better understand this concept, you need to know about the life of a star. Stars are large hot bodies of hydrogen gas that burn brightly for millions or even billions of years through nuclear fusion. But not all stars are the same size. The size of a star is determined by its mass, which is the amount of gas that the star is made of.
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Several decades ago, astronaut, Neil Armstrong became the first person to step on the moon. It was a remarkable achievement. Who would have thought such thing would be possible? Well, since then, no one has made the trip to the moon again. Finally, NASA
Bad air can damage the human lungs. This was a given fact. Well, a new understanding of the relationship between air pollution and the human body is shocking many scientists and doctors. Scientists from the University of Michigan in the U.S. found that th
How do you feel about cloning technology? Some say it’s dangerous. It’s because you can use cloning technology in many bad ways. For example, deadly viruses can be cloned. And I don’t think anyone wants that. However, there are many great ways to use t
The entire nation prayed that Korea’s rocket launch would be successful. Well, nothing is easy. And many failures must occur before any success. The second attempt to launch the rocket happened recently. Unlike the first attempt, the rocket successfully
For many months Korean scientists got together to build something special. It was Korea’s first rocket. It had a lot of meaning. Our neighboring countries all have sent rockets to space. China and Japan have great space technology now. So, Korea didn’t
Scientists and geologists in India are very concerned. Their worry comes from the fact that groundwater in the country is decreasing quickly. Yes, a cold glass of water is becoming precious in India. Soon, India may turn into a country with severe water s
Many car makers are trying to save the environment. That’s why they are all building cars that don’t use gasoline. It’s because cars need gasoline to move. And when they burn gasoline, carbon dioxide and many gases get released into the air. So, the so
There is one color that means danger. What color is that? It’s the color red. At a railroad crossing, flashing red lights warn cars to stay back. A red light at the traffic intersection tells cars to stop, so they don’t run into other cars. And when a d
Space is really amazing and beautiful. Don’t you want to look at the stars or the moon? That’s why we have telescopes. Well, there are some super telescopes. They help look at stars in far away galaxies. Recently, scientists started building the world’
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